US Bridges

Nh 85 over CSX

Good

Rockingham County, New Hampshire · .45 MI SW JCT 108 · Structure no. 018301250006500

Built
2006
19 years old
Condition
Good
inspected July 2024
Type
Girder and Floorbeam System
Steel
Length
110 ft
1 main span
Daily traffic
5,716
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 85 over CSX is a steel girder and floorbeam system carrying Nh 85 over CSX in Rockingham County, New Hampshire. It was built in 2006, so it is 19 years old, younger than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,716 vehicles a day, roughly 5% of them trucks, projected to reach 8,459 by 2043. The structure is 110 ft (33.5 m) long and 40 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesNh 85
CrossesCSX
Location.45 MI SW JCT 108
RouteState Highway 85
CountyRockingham County
StateNew Hampshire
Coordinates43.03868, -70.93617
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70 US tons
Inventory rating48 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length110 ft (33.5 m)
Longest span97 ft (29.6 m)
Deck width40 ft (12.2 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,716 (2023)
Projected traffic8,459 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 85 over CSX built?

It was built in 2006, making it 19 years old in 2025.

What condition is Nh 85 over CSX in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Nh 85 over CSX carry?

About 5,716 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nh 85 over CSX?

The structure is 110 ft (33.5 m) long with a longest span of 97 ft (29.6 m) and a deck 40 ft wide.

Who owns Nh 85 over CSX?

It is owned by the State Highway Agency.